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(No Model.)

,J. W. TOMBO-W.

Nut Look.

No, 239,124. Patented March 22,1881.

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I N PETERS, PHOTD-LITHOGRAPHER. WASHINGTON, D C- UNITED STATES PATENT OFFICE.

JOHN W. TOMBQW, OF MASSILLON, OHIO, ASSIGNOE OF ONE-HALF TO JACOB SONNHALTER, OF SAME PLACE.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 239,124, dated March 22, 18 81. Application filed January 14, 1881. (No model.)

To all whom it may concern:

Be it known that I. JOHN W. TOMBOW, a citizen of the United States, residing at Massillon, in the county of Stark and Stateof Ohio, have invented certain new and useful Improvements in Nut-Locks; and I do hereby declare the following to be a full, clear, and eXact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

This invention consists in the peculiar construction and arrangement of the several parts, hereinafter fully described, and pointed out in the claims.

Figure 1 is a side elevation, and Fig. 2 is a plan of a nut and bolt having my improved look attached thereto. Fig. 3 is the washer. Fig. 4 is the bolt, and Fig.5 is thenut and the locking devices.

a is the threaded bolt, which is provided with one or more longitudinal grooves, a, adapted to receive the feathers b on the washer b. The washer b is employed when the bolt is applied to metal bodies, but when applied to a wooden body the washer may be dispensed with.

I) are a series of holes formed in the washer, and around and equidistant from the center thereof. These holes are so formed that they have one side vertical and the other side sloped in a long bevel, b in the direction of the travel of the nut as the latter is turned onto the bolt.

0 is the nut, which has formed through it vertical opening 0, located outward from and parallel with the central threaded opening, 0 The opening 0' is provided with avertical guide-groove, 0 as shown.

cl is an elastic rod or spring-bar, having one of its ends made fast to the nut and its other end carried directly over the opening 0.

e is an automatic locking-bolt, having a longitudinal feather, e, and a beveled lower end, a. It fits neatly into the opening 0 and groovec and its end projects below the nut, and will drop into the recesses b in the wash er I) or into suitable openings formed in the face of the body against which the nut is turned. A slot, 0 is formed across the head 6 of the locking-bolt, to receive and retain the end of the spring d. The spring d is sufficiently elastic so that it can be lifted from its seat on the head 6 and turned to one side, sothat the locking-bolt can be taken out of the nut when desired. The feather e and the slot or seat c in the head 6, together with the groove 0 in the nut, are all so arranged relatively to each other that when the lockingbolt is placed in the opening 0 the seat e will be in line to receive the end of the spring d.

In applying this nut the locking-bolt and retaining-spring may be arranged before the nut is put on the bolt a. When the nut is turned on so as to bring the locking bolt against the washer the end of the said bolt will drop into one of the recesses b The beveled side of the recess will lift the lockingbolt out of the recess, so that the nut may be turned forward till it is brought tight against the washer. The spring 01 permits the locking-bolt to be lifted, as above stated, and will force the said bolt down into the next recess when the nut has been turned that far. The rear side of the recesses b prevents the reverse turning of the nut. To unlock the nut the bolt e is lifted till its lower end is out of the recess in the washer 3 or the spring cl may be taken out of its seat 6 and the bolt 0 can then be removed, after which the nut can be turned at pleasure; or, instead of lifting the bolt by the hand, the end of the spring can be placed against the side of the head 6 as shown in dotted lines, Fig. 2. Then, by giving the nut a slight forward turn, the bevel b will lift the bolt, and the end of the spring d will slide under the head 6 and hold the end of the bolt clear of the recesses b Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

1. In a nut-lock, the combination, with the nut provided with a vertical opening formed through it and parallel with the bolt-hole, of an automatic locking pin or bolt placed in the vertical opening, and a spring having one of its ends fixed rigidly to the nut audits other.

1o nal feather, e, and the spring 61, having one of its ends made fast to the nut and its other end seated on the head of the bolt a, substantially as set forth.

In testimony whereof I affix U] y signature in presence of two Witnesses.

JOHN W. TOMBOW.

Witnesses:

ISAAC ULMAN, W. O. BEAN.- 

